Route53 Flashcards
Does Route53 require region selection?
No
What is an A record?
Is the fundamental type of DNS record (A stands for Address). Translates a domain name to an its IP address.
What is a CNAME record?
Canonical Name. It’s a record that can be used to resolve one domain name to another.
What is an Alias record?
Alias Record are a record type created by Amazon for AWS, similar to CNAMEs, but with the difference
How do you find the IP address for an ELB?
ELB’s do not have pre-defined IPv4 addresses, you resolve to them using a DNS name.
Which one will be preferred “always”? A CNAME or an Alias record?
Always choose an Alias record over a CNAME
How can you map a naked domain name (zone apex) to an ELB?
Using an Alias Record, which allows to resolve a naked domain name (a zone apex record) to an ELB DNS address.
Are there charge differences between CNAMES and Alias record?
Yes. CNAMEs are charged, Alias records are free.
What is the first step of using Route53?
Create a Hosted Zone
What are the available routing policies in Route53?
Simple Weighted Latency Failover Geolocation
How does the Weighted routing policy work?
Weighted Routing Policies let you split your traffic between regions based on different weights (traffic percentages) assigned (ex: 30% to US-EAST-1, 70% to US-WEST-1)
How does the Latency routing policy work?
Latency based routing allows you to route your traffic based on the lowest network latency for your end user (i.e. which region will give them the fastest response time)
How does the Failover routing policy work?
Failover routing policy are used when you want to create an active/passive set up (Route53 will monitor the health of the primary site using a health check)
How does the Geolocation routing policy work?
Geolocation routing lets you choose where your traffic will be sent based on the geographic location of your users.
Does Route53 supports MX records?
Yes (A, CNAME, MX, NS, SOA,…, AAAA, NAPTR, PTR, SPF, SRV and TXT)
Why is Route53 named so?
The DNS port is 53
Does Route53 support zone apex records? (naked domain names)
Yes
Is there a limit in the number of domain names that you can manage using Route53?
There is a soft limit of 50 domain names, however this limit can be raised by contacting AWS support.
How long can it take to register a domain?
up to 3 days
How does a simple routing policy work?
one record with multiple IP’s. R53 will randomly return values
Can you resolve an ELB by IP address?
No, it will always be a DNS name
What happens if a record fails a health check?
record will be removed until it passes
